Isla Fisher struggled with on-screen kiss.

Australian actress ISLA FISHER found her on-screen kiss with ANDY SAMBERG in new movie HOT ROD challenging – because she couldn’t handle his false moustache.

The pregnant Wedding Crashers star, 31, is used to the thick facial hair her fiance Sacha Baron Cohen sported for his comedy character Borat, but she struggled to cope with Samberg’s fake version. She says, “It was funny because Andy had a fake moustache, and I’ve had some experience wrangling the real thing with Sacha. But Andy’s was supposed to come off in my mouth, so I really had to struggle to get my mouth around everything.”